Based on FlexRay communication driver development for SPC564A80B4

[Mahesh Chamaraja]

Posted on January 25, 2017 at 14:58

Hello all,

We are facing some difficulties with FlexRay driver development for SPC564A80B4.

• We can able to configure the Protocol Control Registers (PCR0~31) for FR configurations, so that ECU and FlexRay module successfully able to move to Normal Active state of Flexray communication.

• Also message buffer configurations for Transmission and reception is also performed according to number slots.

• Tool (CANalyser) is also configured with the same flexray configurations as ECU.

• Now, when we are sending a frame from ECU in slot 64 (dynamic slot).

• But we observed frame error/ SERR error in the CANlyser window, also payload length is observed as zero and slot ID is 64 is visible. (Please find the attached error snapshot SERR_error.jpg)

   

We would like to know what can be the possible reasons for this error.

Please let us know if any additional information is required.

Regards 

Mahesh C

#flexraycommunication-driver-development-for-spc564a80b4

[Erwan YVIN]

Posted on January 26, 2017 at 16:05

Hello Manesh ,

According to the RM, in the chapter 33.4.2

If the protocol engine is clocked by the internal PLL, the frequency of the PE clock source is

system clock / 3. The system clock frequency has to be 120 MHz.

Did you clock your protocol Engine Clock ? on-chip crytal simulator or PLL ?

CLKSEL

Protocol Engine Clock Source Select �? This bit is used to select the clock source for the protocol

engine.

0 PE clock source is generated by on-chip crystal oscillator

1 PE clock source is generated by on-chip PLL

Have you checked the different Status Register , Message Buffer Status Error and Channel A/B Status error?

    Best Regards

                       Erwan

[Mahesh Chamaraja]

Posted on January 27, 2017 at 10:49

Hello Erwan,

We using ext-crystal osc of 40Mhz as a PE clock.

   

[Erwan YVIN]

Posted on February 01, 2017 at 15:23

Hello Mahesh ,

it is often a question of configuration , timing settings.

FlexRay is a difficult IP, with just bad timing setting , nothing can work.

I am checking with experts.

   Best regards

            Erwan

[Erwan YVIN]

Posted on February 02, 2017 at 10:01

Hello Mahesh ,

Honestly , you should try to solve your clock configuration (loss of clock) first because a timing issue on Flexray ip could trigger some synchro issues.

https://community.st.com/0D50X00009XkYOySAN

Did you use official AutoSAR Flexray MCAL driver ?

or it is your own driver ?

Best regards

Erwan

[Mahesh Chamaraja]

Posted on February 02, 2017 at 13:48

Hello Erwan,

Our own driver

Regards

Mahesh